Vapor-burning lamp



Patented June 3, i924.

NETE TATE;

FRANK L. KOHLHASE, OF CHICAGO, ILLINOIS.

VAPOR-BURNING LAMP.

Application filed November 1, 1920. Serial No. 420,929.

To aZZ whom it may concern:

Be it known that I, FRANK Koi-iLHAsE, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Vaporl3urning Lamps; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in vapor burners and mountings therefor, more especially adapted to so-called student or table lamps, which embraces a font containing a volatile liquid fluid, a hand piece therefor and a burner supported by a valved fitting at the upper end of the hand piece through the intermediary of a mounting,

' there being a vaporizing tube that is connected to said fitting and through a suitable conduit with the interior of the font, and which extends upwardly therefrom and dis charges into the burner head supported on the mounting.

Among the objects of the present invention is to provide an efficient match lighter burner of this character in which the volatilizable fuel is vaporized in the vaporizing tube and discharged into the burner head where it is mixed with air for combustion in the burner tubes.

Another object of the invention is to simplify the construction of such burners and mountings therefor and to produce a burner mounting that is centrally symmetrical with respect to the center of the lamp, and which is strong and rugged, and also to provide a burner head mounting that can be readily removed from the valve nipple or terminal and the burner can be readily removed from said mounting. Y

A further object of the invention is to provide a burner head for lamps of this character, which is so constructed with respect to the vaporizing tube as to permit the said tube to be readily removed and replaced for the purpose of cleaning and replacement of the tube.

Other objects of the invention are to improve and simplifyburners and mountings for the general purpose set forth, and the invention consists in the combination and arrangement-of the elements shown 1n the drawings and described in the specification, and is pointed out in the appended claims.

As shown in the drawings:

Figure 1 is a side elevation, with parts broken away, of a lamp embodying my invent-ion showing the shade in dotted lines.

Figure 2 is a side elevation of the burner and mounting shown in Figure 1, as viewed from a direction at right angles to the plane of Figure 1.

Figure 3 is an enlarged sectional detail of the burner head, showing the means for supporting the head on the mounting and for connecting the vaporizing tube with the burner head. 7

As shown in the drawings, 10 designates the font of the lamp having a flat bottom to constitute a support. 11 a standard or hand piece that is supported between the cone like formation 12 of the upper wall of the font, and a valved fitting 13 that is carried by a part rising from the font and communicates in any suitable manner with the conduit 14 within the hand piece, said conduit extending to the bottom of the font in the manner indicated in Figure 1. The font is provided with the usual filling opening that is closed by a cap 15, and with a normally closed air passage adapted to be fitted to the nozzle of a pump to maintain the desired pressure on the liquid fuel in the font.

The said valved fitting is provided with any suitable form of valve, the stem 16 of which is provided with the usual hand wheel. Said fitting has a passage17 that is adapted to be connected to the conduit 14-.

and to be shut 0E therefrom by the valve. The valved fitting is formed with an upwardly extending externally threaded terminal 18 over which fits a cap nut 19 for a purpose hereinafter to be described.

20 designates-across bar that is intermedially apertured to fit over said terminal. Said cross bar isheld in fixed relation to the terminal 18 by a lock nut 21, threaded to the terminal and bearing against said cross bar to confine the bar between the nut and an upwardly facing shoulder 22 on the valved fitting'13 so that the nut 21, so far as fixing the cross bar to the valved fitting,

has the function of a locking nut.

23,. 23 designate standards which rise from a burner head designated as a whole by 25, as herein shown, and preferably, the standards are made integral parts of said cross bar, giving to the burner head mounting thus formed ageneral Ushape. Said mounting is preferably of strap like cross section, but may be otherwise formed. The upper ends of said standards are turned inwardly to form horizontally disposed lugs 24 which underlap and are fastened by screwsor like fastening means to oppositely extending lugs 24: at the lower side of the burner head. The arrangement shown constitutes a very simple and rigid mounting forthe burner that can be made strong, while light in weight, and one that is fixedly connected to the burner head and valved fitting.

The burner head comprises as its individual parts a mixing chamber 26 having an enlarged lower portion 27,.a generally U- shaped cross head 28, and depending burner tubes 29 that are threaded to the lower ends of the cross head. In a construction where but a single burner is used, but one of the tubes 29 is employed. Said burner tubes carry at their lower ends the usual refractory mantles 30 in which the mixture of air and vaporized fuel is burned to increase the candle. power of the burning mixture.

A. hollow, externally threaded bushing 31 extends into the lower end of the mixing chamber 26 and is threaded into said mixing chamber 26. It is provided at its lower end with a flange or head 32 that limits movement into said mixing chamber. The vertical opening 33 of said bushing is flared downwardly and outwardly, for a purpose hereinafter to be described. The enlarged portion 27 of the mixing chamber is formed at one side with a threaded opening to receive one end of an air inlet tube 34 which, as herein shown, is directed laterally and thence downwardly to conform to the curvature of the usual shade 35 with which such lamps are commonly equipped.

Vaporized fuel is furnished to the burner head through the medium of a vaporizing tube designated as a whole by 87. It is formed at its lower end with a conical head 38which fits against the wall of an upwardly and outwardly flaring recess of the terminal 18 of the valved fitting 13. The said vaporizing tube extends through a central opening in the upper Wall of the hollow 8r cap nut 19, and the conical head 38 can be fitted to the lower end of the tube after the nut has been placed on the tube. With this construction, it will be seen, by inspection of Figure 1, that the closed end of said nut serves to force the conical head against the a tapered wall of the recess of the valved fitting terminal. I

The upper end of the vaporizing tube 37 loosely fits in the bushing 31 before described at the lower end of the mixing chamber, as best shown in Figure 3, and extends centrally through the flaring opening 33 thereof. The upper terminal of said tube 37 fits loosely within smaller or restricted portions of the flaring opening, so that thereby the heat conducting contact of the tube with the bushing is small. The tube is formed with the usual minute nozzle at the upper end. To disconnect the vaporizing tube it is only necessary to release the nut 19 and lift the tube until the lower tapered end thereof clears the terminal 18, whereupon the tube can be swung sidewise at its lower end, as permitted by the flaring opening 33. Thereafter the vaporizing tube can be freely withdrawn from the bushing 31 and the burner head.

Inasmuch as all the weight of the burner head and shade is carried by the U-shaped mounting, the vaporizing tube may be made of thin or light gauge metal, so as to quickly transmit the heat of a flame applied to the tube to the liquid fuel inside thereof to vaporize the fuel. Any suitable means may be employed for facilitating the vaporization of the liquid fuel within the vaporizing tube. As herein shown, the vaporizing tube is surrounded by a downwardly opening conical flame arresting element 40, which may be made of thin gauge material and can be attached at its smaller end to the vaporizing tube 37. If desired, a small vent opening 41 may be formed in the upper end of the conical flame arresting element closely adjacent to the tube thereof. The construction described enables the burner to be readily started by the flame of a match being held against the tube 37 beneath the arresting element 4:0. Said arresting member confines the flame against the tube 37 which, being made of thin gauge metal, and one that is a good conductor of heat, conducts the heat of the flame quickly to the fuel oil within the tube. The presence of the vent opening 4-1 has a tendency to cause a slight upward movement of the burning gases of the flame within the arresting element and along the tube and above the same, and thus avoid the escape of the flame around the lower edge of the flame arresting element.

It will'be noted that when twin burners are used, the vaporizing tube 37 lies between the burner tubes 29 and the mantles 30. so that when the burner is started the heat gen erated in said burner tubes and mantles will maintain continuous vaporization of the liquid fuel until the supply of the fuel is cut off from the font through the action of the valve controlled by the stem 16.

Carried by the burner head is a shade sup porting ring or frame 42, which may be fixed to the burner head in any suitable manner, as by being clamped between a shoulder $3 on a screw belt 449 and. a hollow threaded lug 45 that rises from the burner head.

The construction shown provides an exceedingly simple burnerand mounting for a lamp of the general character shown, and provides a vapor lamp burner which can be readily started by the flame of a match. The construction shown also provides an exceedingly simple and rigid mounting for the burner head on the stem or standard of the lamp, and the particular construction is such that the mounting standards 23 and the vaporizing tube 37 cast but little or no shadow when the burner is in operation.

I claim as my invention:

1. In a burner and mounting for a vapor lamp, a valved fitting for controlling liquid fuel supply, a burner head embracing a mixing chamber and a communicating burner tube, supporting means for said burner head embracing a U-shaped member fixed at its closed portion to said fitting and with its upright arms inturned and attached to the burner head, and a thin walled vaporizing tube communicating at its lower end with said fitting and disposed between said up right arms and loosely entering said mixing chamber, said vaporizing tube being provided between its ends with a surroundmg, thin heat conducting flame arrester attached in heat conducting relation to said tube.

2. In a burner and mounting for a vapor lamp, a valved fitting for controlling liquid fuel, a burner head embracing a mixing chamber and a communicating burner tube, and provided with an opening to admit air to the mixing chamber, a vaporizing tube loosely entering said mixing chamber and having a lower cone-like head that enters a tapered formation in said valved fitting, a nut threaded to said fitting to force said head against said tapered formation, and a U-shaped member also threaded to said fitting and having upright standards, with means to fasten the burner head to the upper ends of said standards.

In witness whereof I claim the foregoing as my invention, I hereunto append my signature this 28 day of October, 1920.

FRANK L. KOHLI-IASE. 

